Things to consider when writing for touch screen?

Question

I\'m starting a new project which involves developing an interface for a machine that measures wedge and roundness of lenses and stores the information in a database and reports

Answer 1

The larger gui elements is the major thing. But it applies to all elements, scroll bars, tabs and even text fields.

The other major thing that I can think of, it's hard for the user to right click. So things that require a right click should be avoided, context menus are the only thing that comes to mind at the moment.